Window



Dec. 12, 1939.

c.- o'Toou:

WINDOW Filed May 13, 1939 2 Sheets-Sheet 1 Patented Dec. 12, 1939 UNITED STATES PATENT orrics WINDOW Charles OT'oole, Brooklyn, N. Y. Application May 13, 1939, Serial No- 273,488

13 Claims. (Cl. 42)

The invention relates to windows, and more particularly to a window which is capable of various adjustments to secure varying degrees of ventilation.

5 A window has an upper, lower and an intermediate sash, the intermediate sash being capable of being attached to, or disconnected from, the upper sash so as to be capable of use as a ventilator adjacent the sill of the window frame.

59 The lower sash section is provided with a part of a locking mechanism, and each of the other sectionsis provided with a locking mechanism part co-operating therewith, so that the window opening may be completely closed, and all of the sashes locked against movement, or the upper and the lower sash may be locked in relation to each other While the third or ventilator sash is so set as to provide an air opening at the bottom of the window.

2.5% This construction permits the adjustment of the ventilator sash to admit air at the bottom of a window and the locking together of the other two sashes and their vertical adjustment together in a manner to permit the formation of 5 an opening above the upper sash, if desired,

while at the same time affording the same measure of safety, so far as intrusionthrough a window is concerned, as is secured with a fully closed and locked window.

In producing a Window embodying the invention, I provide a special construction of parting strip-sand inner stops which will not only permit the inward tilting of the ventilator sash when adjusting it for bottom ventilation, but will permit either or both upper and lower sashes to be removed'in their entirety from a window frame and brought within a room so as to expose substantially the entire window opening in a manner to secure the maximum ventilation. By this 40 construction, the window sashes may not only be adjusted in a manner to secure the maximum ventilating effect, but to secure this effect notwithstanding the use of protective gratings or over-all screens upon the outside of the Window.

In a window embodying the invention, the operation of the sashes in opening and closing the Window by vertical sliding movement in the channels at the stiles, is the same as with an ordinary window having vertically slidable sashes, and

so the capability of the upward and downward movement of the sashes in said channels is utilized in permitting that adjustment of the sashes above referred to. The construction of the parting strip and inner stop is, in each instance,

5 such as to permit the withdrawal of the sashes from the frame only when they are in certain positions which will not interfere with the ordinary window operation.

The construction of the window frame and the sashes is. such as to permit a sufficiently tight 5 fitting of the sashes in relation to the stops and parting, strips to provide a Weather-tight window. The construction and manner of applying the parting strips is such as to minimize possible leakage of the elements through the frame, 10 the stiles of the frame and the sill and lintel thereof being continuous and weathertight instead of having the parting strips set into channels through the stiles as with many types of sliding windows. 15

The third or ventilator sash, when tilted inwardly of a room when it is adjusted as a ventilator, may be, and preferably is secured to the lower sash in a manner to limit the extent of the tilting movement by an adjustable mecha- 2 nism similar to a safety chain bolt used upon doors. The construction, however, is such that if desired, this ventilator sash may be entirely removed fro-mpthe frame and a high measure of safety secured by locking the upper and the lower 2.5 sashes together, so that any opening movement of the window will be limitedto the height of the ventilator sash, even though the safety chain bolt is not in use. In fact, under some conditions of use, the ventilator sash may be so moved 30, as to rest upon the sill of the window frame, this sash and the outer stop being so formed as to permit this ventilator sash to be used as an extension sill projecting within a room.

Whatever the adjustment of the sashes may 3 be, the construction is such that no part of any sash will, during or after adjustment, extend beyond the outer stop strips of the window. The various mechanisms permitting adjustment of the sashes are all permanently connected in 40,- a manner to permit not only a rapid and convenient adjustment of the various sashes to secure varying degrees of ventilation, but to permit a rapid and convenient} restoration of the sashes to within the frame when adjustment for 45 ventilation is no longer desired.

In removing the sashes from the frame, each sash is completely reversed, so as to expose the outside of the light or lights of glass within a room, thus facilitating cleaningof the windows even though the window opening itself be permanently closed by an over-all screen or by safety gratings upon the outsideof the window opening. I

, The construction is such that when installing.

or repairing a window, the parting strips may be adjusted in a manner to secure a weathertight fit between same and the upper sash, the outer stop being permanently connected with the window frame and the inner stop, as with all windows, being capable of being reset in order to permit the formation of a tight joint between the lower sash and said inner stop.

In a window embodying the invention, the sashes are of varying widths so as to permit each sash to pass through the parting strips and the inner stops with a proper positioning of the sash in relation to these parts.

In a window embodying the invention, the sill and lintel construction of the frame is as in ordinary windows, the frame in fact being in all respects, except as to the parting strips and the inner and outer stops, as in the ordinary window.

The invention consists primarily in a window frame having side stiles, a sill and lintel, inner and outer stops, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, a top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips, a pivotal link connection between same and said upper sash, a second pair of slides movable between said inner stops and said parting strips, a pivotal link connection between same and said lower sash, pintles upon said ventilator sash, and supplemental inner stops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but slightly more than the width of said ventilator sash; and in such other novel features of construction and combination of parts as are hereinafter set forth and described, and more particularly pointed out in the claims hereto appended.

Referring to the drawings,

Fig. 1 is a vertically and laterally condensed elevation of a window embodying the invention, partly broken away and with the inner stop on one stile removed;

Fig. 2 is a vertically condensed view of one of the stiles and the parts associated therewith;

Fig. 3 is a section on the line 33 of Fig. 1;

Fig. 4 is a section on the line 44 of Fig. 1;

Fig. 5 is a section on the line 5-5 of Fig. 1;

Fig. 6 is a view of the lower part of the stile opposite that shown in Fig. 2;

Fig. 7 is a view illustrating the adjustment of the upper and lower sashes for securing the maximum ventilation; and

Fig. 8 is an illustrative view showing different adjustments of the ventilator sash.

Like numerals refer to like parts throughout the several views.

In the accompanying drawings, the detailed construction of the window frame, apart from those features incidental to the operation of a window embodying the invention, is not shown, since this frame may be of the usual well known construction except as herein noted.

This frame has the usual channelled lintel l and sill ii. The stiles I2, however, are flat throughout, the parting strip and inner and outer stops being secured in abutting relation to the stile.

In describing the window structure, the construction and arrangement of the stops and parting strips adjacent one stile only will be described,

since with the exception of one structural detail, as shown particularly in Fig. 6, the stile structure upon opposite sides of the window is identical.

The outer stop strip [3 is grooved to form a bead M forming an edge channel for the upper window sash, and a way for the slide to which said sash is connected.

As will more fully appear hereinafter, the window of the invention has three sashes, an upper, a lower and an intermediate or ventilator sash. These three sashes are of different widths, the upper sash being the narrowest, the lower sash being the widest and the intermediate or ventilator sash being of a width intermediate the two other sashes.

By reason of the different widths of the sashes, the channel bead i4 is of greater depth throughout the upper portion thereof, as indicated at Ma, than throughout the lower portion thereof, as indicated at Mb, thus providing space for the run of the intermediate or ventilator sash.

The inner stop strip I is grooved to form a bead l5 forming a guideway for a slide to which the lower window sash is connected. This bead is of uniform depth throughout. Adjacent the bottom of the stop I5 is a supplemental stop strip 41 which terminates at a point to provide sufficient clearance toward the top of the window for the movement of the lower sash inwardly of the ii frame. The supplemental stop strip I1 forms the front wall of a channel in which the lower sash has movement.

Secured to the stiles of the frame intermediate the inner and outer stop strips is a parting strip so formed as to co-operate with the beads I4 and i6 forming guideways for the slides for the upper and the lower sashes, and to form channels of different depths for the lower and the upper and the intermediate or ventilator sashes. This parting strip is generally rectangular in form, having a base flange 58 adapted to abut against the stile of the frame, and a flange l9 projecting at right angles to the stile.

One portion of the flange l9, shown at 2!] in Figs. 1 and 2, is of a depth to project across and engage the edge of the side bars of the upper sash; an intermediate portion 2! is of a depth to project across and engage the edge of the intermediate or ventilator sash while permitting the passage of the upper sash, and a third portion 22 toward the bottom of the frame is of a depth to permit the passage of the intermediate or ventilator sash. One side of the flange i9 is grooved to form a bead 23 oppositely disposed to, and having the same configuration as, the bead I l and for the same purpose, to wit: providing differently spaced guides to afford channels of different depths for the upper and intermediate or ventilator sashes.

The other side of the flange I9 is grooved to form a second bead 24 oppositely positioned in relation to, and co-operating with, the bead Hi, to form therewith the bottom of a guide channel for the lower sash. The beads l6 and 23 are of uniform depth throughout, the upper portion of the head 23 extending in the same plane as the upper portion of the front stop so as to maintain the lower sash in a position where it may be swung outwardly of the frame when positioned above the supplemental front stop H.

The parting strip is secured to the stile by means of screws 25 passing through elongated slots 26 in its base flange l8 so as to permit adjustment of this strip to secure a weather-tight joint about the upper and intermediate window sashes.

By providing a parting strip having three sections of different depths, as described, vertical movement of the sashes is permitted without likelihood of accidental displacement of any sash in relation to the flange, and yet each sash may be brought to a position within the frame where, without any disturbance of the stops or the parting strip, it may be moved inwardly of a room from the frame.

Mounted in the groove formed between the beads I 4 and 23 and the base flange N3 of the parting strip is a slide 21 of generally T-shaped form having a stem of a length to pass between and project beyond said beads. The upper sash is connected to this slide as is the sashweight cord or chain 28. The manner of attaching the upper sash to this slide, as shown more particularly in Fig. '7 of the drawings, will be more fully referred to hereinafter.

Mounted in the grooves formed by the beads 16 and 24 and between these beads and. the face of the stile is a slide 29 to which the lower window sash is connected in a manner to be hereinafter described, and to which the sashweight cords or chains 33 are also connected. This slide is also generally T-s'haped having a stem of a length to pass between and project slightly beyond the beads l6 and 24.

At 3| and 32 I-have shown fragmentary portions of the sheaves for the sashweight cords or chains.

As heretofore stated, the window includes three sashes, an upper sash 33, a lower sash 34 and an intermediate or ventilator sash 35. The sashes 33 and 35 are detachably connected in any desired manner, as by the clasp mechanism 36, so that these two sashes may have simultaneous or independent movement in the channel "formed between'the parting strip and the outer stop.

The upper sash 33 is of a width, as indicated in dotted lines in Fig. 1, to be guided in its vertical movements by the section 20 of the parting strip, but to be capable of passing the section 2| of this strip. The sash 35, as also indicated in dotted lines in Fig. 1, is of a greater width than the sash 33, but of a width to be guided in its'movement by the section 2| of the parting strip, and to freely pass the section 22 of the parting strip and the supplemental front stop IT. The lower sash 34 is of greater width than the intermediate or ventilator sash 35, being of a width to be guided in its movement by the supplemental front stop 11, but to freely pass the front stop l5 when the sash is brought above said supplemental front stop.

The supplemental front stop, as heretofore stated, is of a height to permit the entire lower sash 34 to pass above the stop.

The lower bar of the upper sash is provided with one member 31 of an ordinary window sash lock, the lower bar of the intermediate or ventilator sash 35 being provided with a sash lock member 38 having the same form as the sash lock member 31. The top bar of the lower sash 34 is provided with a sash lock member 39 adapted to co-operate with either of the sash lock members 31 or 38.

The lower part of the upper sash 33 is'co-nnected with its slide 21 by pivotally connected links 4ll4fla upon opposite sides of the window, one end of the link 40 being pivoted to the slide, and the end of the other link 40a being pivoted to the lower portion of the side bar of the upper sash 33, as shown in Fig. 7. Two similarly pivotally connected links 4| and 42: are used to connect the lower sash 34 with its slides. One'end of each link 4| is pivotally connected with the slide,'and the other. end is pivotally connected with one end of the link 42. Each link 42 is pivotally connected with a side bar adjacent the lower part of the.

sash 34. The pivot connecting the link 42 with the sash is shown at 43. Adjacent each link 404l is a stop 40b--4la.v for limiting movement of. the link when'bringing the sashes within a room. The links 40a42 are provided with a turned edge 42a adapted to embrace the lower edge of the links Mia-4|, as shown in Fig. 7 of the drawings, when the lower sash is positioned within the frame for movement with the slides 29.

The lower portion of each side bar of the lower sash 34 is cut away to form a pocket 44 for the reception of the links 4l 42 when this sash is positioned for sliding movement in the frame. This pocket 44 is closed on one side of the sash by a face plate 45, and on the other sideby a metal flange 46 carried by and movable with the slide 29 I V The intermediate or. ventilator sash 35, adjacent the bottom bar at each end thereof, has a pintle 41 movable in the same channel and in relation to the same slides as the upperwindow sash 33. The top bar of this sash carries one of the members of the latch mechanism 36, and also the slotted plate of a chain bolt mechanism 48,

angularity up to almost according to the position of the lower sash. In assuming these positions, the sash 35 must turnupon the pintles 41, which pintles preferably are square. To permit this turning movement, the lower part of the bead I41) and of the bead 23 are of a length to terminate, as shown in Figs. 2 and '7, above the sill a distancev to permit the angular movementzof the sash 35 above referred to, and to serve as a stop at one of the stiles when the sash is in the position shown in dotted lines in Fig. 8.

Under some conditions of use, it is desirable to completely remove'the sash 35 from the window frame, and to permit this, the beads 14b and 23 upon one of the stiles, terminate at a point'more remote from the sill than the beads I41) and 23 upon the other stile, thus providing beads l4b and 23 upon one stile which are of a height to permit lateral and upward tilting of the sash in a manner to permit disengagement of both pintles 41 from the channel in which they normally have movement. This is shown in Fig. 6'of the drawings.

The operation of the herein described window is substantially as follows:

When it is desired to completely close a window, the latch mechanism 36 is set to secure the intermediate or ventilator sash, 35 to the upper sash 33, so that these sashes will have movement together. I

In a window actually constructed in accordance with the invention, the sash 35 is approximately one-half the height of either of the other sashes as or 34.

' from its co-operating member 38, the lower sash may be raised, or the upper and intermediate or ventilator sashes may be lowered, so as'to expose substantially 40% of the window opening for ventilation purposes, which space may be divided it} between the top and bottom of the window frame their respective sashes. f tween the flange I8 of the parting strip and the if desired.

When raising or lowering the sashes, the slides 2! and 23 adjacent each stile have movement with The slide 21 moves bebeads E4 and 23 upon the outer stop and the parting strip respectively, and the slide 29 moves between the side stile and the beads l and 24 on the front stop and the parting strip respectively.

The side bar of the sash 33 positioned between the outer stop l3 and the parting strip bears upon the beads and 23, while the side bar of the lower sash 34 positioned between the parting strip and the supplemental stop ll bears upon the bead 2-; only, suificient clearance in each instance being provided to ensure a smooth movement of the window and space for the links connecting each sash with a slide.

When it is desired to use the intermediate or ventilator sash 35, the latch mechanism 35 is released and said sash is permitted to drop to the sill t t. The lower sash 3,4- is then raised until the chain of the chain bolt mechanism of the member 40 may be engaged with the member 48. With the parts in this position, the intermediate or ventilator sash 35 may be tilted inwardly of a room to an extent determined by the chain mechanism ail-55, as determined by the position of the lower sash 3- 5. By raising the lower sash, the angle of the ventilator sash to the horizontal may be increased, while, by lowering the sash 34, this maybe decreased.

When the ventilator is so set, the lock member 39upon the lower sash may be engaged with the lock member 3'! upon the sash, so that both these sashes may have movement in unison and ventilating space may be provided both at the top and the bottom of the frame.

With this arrangement, ventilating space amounting tonpproximately of a window opening may be provided and yet have the window locked. When the parts are adjusted in this manner, upward movement of the sashes 33 and (i l will diminish the ventilating space at the top of th ""ndow, and by reason of the change in the angulr. ty of the ventilator sash because of the up cl. pull upon the chain of the member 49, also diminish theventilating space at the bottom of the window, since the sash 35 will be drawntcward the sash 34.

. If it be desired to provide ventilating space only at bottom of the window, the chain of the member 49 is disconnected from the member 48 and the ventilator sash tilted until it rests upon the sill as shown in Fig. 8 of the drawings in dotted lines, the sashes 33 and 30 being locked together if desired so that a full 20% ventilating space is provided at the bottom of the window frame if no ventilating space is provided at the top, yet the window is locked against possible intrusion by an outsider. It is obvious that with this setting of the window, both sashes 33'and 34 may be lowered to reduce the ventilating space at the bottom and afford ventilating space at the top of the frame. I

.By the above adjustments, a ventilating area may not only be provided and still have the window locked against intrusion, but this area may be varied and distributed in accordance with the temperature and weather conditions or the whims of the occupant of the room.

The various adjustments above referred to, however, limit the ventilating area to a maximum of of the space of the window frame. If more than 40% is required, the window cannot be locked, but the construction is such that a ventilating area up to approximately 100% of the space of the window is permitted by other adiustments of the sashes.

If ventilating area is required, the lower sash is unlocked from the upper sash and raised to an extent to permit lateral tilting of the ventilator sash to a point to permit the pintles 4'! to pass the section 22 of the parting strip and the supplemental front stop l1, and this sash removed from the frame, or the sash 35 may be positioned as shown in dotted lines in Fig. 8. By raising and lowering the upper and lower sashes 33 and 3 until they coincide in position, a ventilating space of 60% of the area of the window frame is permitted, which may be at either the top or the bottom or divided between the top and the bottom as desired.

If still reater ventilating space desired, the ventilator sash 35 must be removed from the frame in the manner above described. The lower sash 3 is raised until the bottom thereof is above the top of the suplemental inner stop H. The u; or sash is then lowered until the top of this sash is below the portion 20 of greatest depth of the parting strip. With the sashes thus positioned, it is merely necessary to pull the top of the upper sash 3d inwardly of a room and to allow it to drop across the sill 50 in the manner illustrated in Fig. '7. The links 40 swing inwardly of the room with this movement of the sash. The bottom or the lower sash 34 is then drawn in war-dly of the room, past the inner stop ll, and then allowed to drop substantially parallel with the upper sash with a rotating movement about the pivot 423. When the two sashes are thus positioned, about of the window space is available for ventilating purposes. This adjustment is largely for night ventilation, and this adjustment for ventilation will be resorted to only during extremely hot summer nights.

It will be noted that in all of the adjustments of each of the sashes, the movement is always inwardly of a room, and that no part of any sash ever projects beyond the outer stops l3. Consequently, windows made in accordance with the invention can be effectively when the window openings are protected by all-over outside screens or by various forms of gratings or bars.

Since, when the sash 35 is in the position shown in dot-ed lines in Fig. 8, and when the sashes 33 and as are reversed and dropped in a room as shown in Fig. 7, the outside of the light or lights of glass is exposed within a room, the outside of the windows may be readily cleaned while the sashes are in this position, notwithstanding the use of over-all outside screens or protecting gratings and bars.

. Vfhen the sashes 33 and 32 are adjusted as shown in Fig. 7 to restore them to within the frame, the procedure will be the reverse of that described, except in inverse order.

The bottom bar of the sash 3G is first raised to permit the slides 29 to move upwardly so as to position the pivotal point of connection of the .mental stop strips l1.

links 4| with these slides above the inner supple- Thereafter, the links 4| will fold upwardly and inwardly and the links 42 will fold downwardly and inwardly until the turned edge 42a embraces the edge of the co-opcrating link 4|. When these links are folded, the sash 34 is turned about the pivots 43, passing the front stop until it engages the plate 46 and is in operative relation to the flange IQ of the parting strip.

The upper sash 33 is then turned about its pivotal connection with link 40a and raised, the links 40-400. folding upwardly and inwardly of the frame. During this turning movement, the

side bars of the sash 33 pass the supplemental inner stop l1 and the portions 2| and 22 of the parting strip until they engage the outer stop l3. The upper sash 33 is then raised and the intermediate or ventilator sash 35 is tilted until its pintles pass the supplemental stop I1 and the parting strip, and the bottom bar abuts against the outer stop |3, whereupon the sash may be turned about the axis of its pintles to restore it to position immediately below the upper sash 33. The upper-sash 33 is then lowered with its bottom bar in engagement with the top bar of the ventilator sash, and the latch mechanism 36 is then set and the two sashes 33 and 35 are raised and the remaining sash 34 lowered to restore the window to its fully closed position where it may again be locked by the engagement of the locking member 39 with the locking member 38. When the ventilator sash 35 is turned about its pintles to position it below the upper sash 33, the engagement of the bars of this sash with the outer stop I3 will aline the pintles 41 with the space between the beads l4 and 23.

It is obvious that if there are any projecting parts of the various metal fittings which would interfere with a free movement of the sashes, these sashes may be so cut away as to provide clearance for the movement of the parts upon one sash in relation to another sash, or in relation to parts of the same sash, and suitable fillers provided to close these spaces when the window is closed to avoid excessive seepage of air about the sashes.

It will be noted that when the window is fully closed, the portion 20 of the parting strip which .hereinbefore referred to.

is of greatest depth forms an effective barrier to the seepage of air about the upper sash 33; that the portion 2| of the parting strip forms an effective barrier to the seepage of air about the intermediate or ventilator sash 35, and that the supplemental stop I! forms an effective barrier to the seepage of air about the sides of the lower sash 34.

The construction generally of the sashes 33, 34 and 35, except for their varying widths, is the same as in ordinary window sashes. The different widths of the sashes necessitates the particular formation of the beads and parting strips The material used in the window structure is immaterial to the invention.

It is not my intention to limit the invention to the detailed construction of parts herein set forth and shown in the accompanying drawings, it being obvious that such may be varied and still secure the desired mode of operation of the various parts of the window.

The latch mechanism 36 and the chain bolt mechanism 48-49 as used on the window are open market fittings, and it is obvious that fittings of a special design more effective in a window structure may be advantageously used.

Having described the invention, what I claim as new and desire to have protected by Letters Patent, is:

1. A window frame having side stiles, a sill and lintel, inner and outer stops, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, a

top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips, a pivotal link connection between same and said upper sash, a second pair of slides movable between said inner stops and said parting strips, a pivotal link connection between same and said lower sash, pintles upon said ventilator sash, and sup plemental inner stops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but slightly more than the width of said ventilator sash.

. 2. A window frame having side stiles, a sill and lintel, inner and outer stops each having a bead forming grooves between same and the stile, parting strips having three sections of progressively decreased depth from the top toward.

the bottom thereof, each having beads upon opposite faces thereof forming grooves between same and the stile, a top sash, a ventilator, sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash,

means whereby said top sash and said ventilator sash maybe detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips in the aforesaid grooves, a pivotal link,

connection between same and said upper sash, a second pair of slides movable between said inner stops and said parting strips in the aforesaid grooves, a pivotal link connection between 3. A window frame having side stiles, a sill and lintel, inner and outer stops, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof,

same and said lower sash, pintles upon said ventilator sash, and supplemental inner stops' a top sash, a ventilator sash of greater width.

than said top sash, and a bottom. sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said inner stops and said parting strips, outer stops and said parting strips, a pivotal link connection between same and said upper sash, a second pair of slides movable between said inner stops and said parting strips, a pivotal link conrespectively, whereby said bottom sash may be selectively locked in relation to either said upper or said ventilator sashes.

4. A window frame having side stiles, a sill and lintel, inner and outer stops, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, a top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips, a pivotal link connection between same and said upper sash, a second pair of slides movable between said inner stops and said parting strips, a pivotal link connection between same and said lower sash, pintles upon said ventilator sash, flexible means whereby the lower part of said bottom sash may be connected with the upper part of said ventilator sash to limit relative movement of these sashes and control the angular positioning of said ventilator sash, and supplemental inner stops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but slightly more than the width of said ventilator sash.

5. A window frame having side stiles, a sill and lintel, inner and outer stops, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, a top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips, a pivotal link connection between same and said upper sash, a second pair of slides movable between said inner stops and said parting strips, a pivotal link connection between same and said lower sash, pintles upon said ventilator sash, flexible means whereby the lower part of said bottom sash may be connected with the upper part of said ventilator sash to limit relative movement of these sashes and control the angular positioning of said ventilator sash, supplemental innerstops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but sli htly more! than the width of said ventilator sash, a locking member carried by the top bar of said lower sash, and co-operating locking members carried by the bottom bars of said upper sash and said ventilator sash respectively, whereby said bottom sash may be selectively locked in relation to either said upper or said ventilator sashes.

6. A window frame having side stiles, a sill and lintel, inner and outer stops, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, a top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips, pivotally connected links, a pivotal connection between one of said links and said slide, a pivotal connection between the other of said links and the lower part of said upper sash, a second pair of slides movable between said inner stops and said parting strips, a pivotal link connection between same and said lower sash, pintles upon said ventilator sash, and supplemental inner stops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but slightly more than the width of. said ventilator sash.

'7. A window frame having side stiles, a sill and lintel, inner and outer stops, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, a top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips, a pivotal link connection between same and said upper sash, a second pair of slides movable between said inner stops and said parting strips, said bottom sash having an edge pocket at each side adjacent the bottom thereof, a plate closing the inside of said pocket, two pivotally connected links, one of said links being pivoted to one of said last named slides, and the free end of the other of said links being pivotally connected with said bottom sash within said pocket, pintles upon said ventilator sash, and supplemental inner stops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but slightly more than the width of said ventilator sash.

8. A window frame having side stiles, a sill and lintel, inner and outer stops, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, a top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips, pivotally connected links, a pivotal connection between one of said links and said slide, a pivotal connection between the other of said links and the lower part of said upper sash, a second pair of slides movable between said inner stops and said parting strips, said bottom sash having an edge pocket at each side adjacent the bottom thereof, a plate closing the inside of said pocket, two pivotally connected links, one of said links being pivoted to one of said last named slides, and the free end of the other of said links being pivotally connected with said bottom sash within said pocket, pintles upon said ventilator sash, and supplemental inner stops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but slightly more than.

the width of. said ventilator sash.

9. A window frame having side stiles, a sill and lintel, inner and outer stops, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, a top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable betwen said outer stops and said parting strips, pivotally connected links, a pivotal connection between one of said links and said slide, a pivotal connection between the other of said links and the lower part of said upper sash, a second pair of slides movable between said inner stops and said parting strips, said bottom sash having an edge pocket at each side adjacent the bottom thereof, a plate closing the inside of said pocket, two pivotally connected,

' links, one of said links being pivoted to one of said last named slides, and the freeend of the other of said links being pivotally connected with said bottom sash within said pocket, pintles upon said ventilator sash, supplemental inner stops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but slightly more than the width of said ventilator sash, a locking member carried by the top bar of said lower sash, and co-operating locking members carried by the bottom bars of said upper sash and said ventilator sash respectively, whereby said bottom sash may be selectively locked in relation to either said upper or said Ventilator sashes.

10. A window frame having side stiles, a sill and lintel, inner and outer stops, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, a top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips, pivotally connected links, a pivotal connection between one of said links and said slide, a pivotal connection between the other of said links and the lower part of said upper sash, a second pair of slides movable between said inner stops and said parting strips, said bottom sash having an edge pocket at each side adjacent the bottom thereof, a plate closing the inside of said pocket, two pivotally connected links, one of said links being pivoted to one .of said last named slides, and the free end of the other of said links being pivotally connected with said bottom sash within said pocket, pintles upon said ventilator sash, flexible means whereby the lower 'part of said bottom sash may be connected with the upper part of said Ventilator sash to limit relative movement of these sashes and control the angular positioning of said ventilator sash, and supplemental inner stops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but slightly more than the width of said ventilator sash.

11. A window frame having side stiles, a. sill and lintel, inner and outer stops each having a bead forming grooves between same and the stile, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, each having beads upon opposite faces thereof forming grooves between same. and

the stile, a top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips in the aforesaid grooves, a pivotal link connection between same and said upper sash, a second pair of slides movable between said inner stops and said parting strips in the aforesaid grooves, a pivotal link connection between same and said lower sash, pintles upon said ventilator sash, the beads upon one outer stop and upon the associated parting strip terminating above the sill, and the corresponding beads upon the other stile terminating at a point above and more remote from the sill than said other beads, whereby said ventilator sash may be held at substantially right angles to said parting strip or may be laterally tilted to disengage the pintles from the frame, and supplemental inner stops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but slightly more than the width of said ventilator sash.

' 12. A window frame having side stiles, a sill and lintel, inner and outer stops each having a bear forming grooves between same and the stile, parting strips having three sections of progressively decreased depth from the top toward the bottom thereof, each having beads upon opposite faces thereof forming grooves between same and the stile, the beads upon the outer stop and the co-operating beads upon the parting strip being of greater depth toward the top thereof than toward the bottom thereof, a top sash, a ventilator sash of greater width than said top sash, and a bottom sash of greater width than said ventilator sash, means whereby said top sash and said ventilator sash may be detachably connected for simultaneous or independent movement, slides movable between said outer stops and said parting strips in the aforesaid grooves, a pivotal'link connection between same and said upper sash, a second pair of slides movable between said inner stops and said parting strips in the aforesaid grooves, a pivotal link connection between same and said lower sash, pintles upon said ventilator sash, and supplemental inner stops adjacent the bottom of a frame spaced apart a distance less than the width of the lower sash but slightly more than the width of said ventilator sash.

13. In a window, a parting strip embodying therein a. flat base adapted to abut against and be secured to the stile .of a window frame, and a right angularlyextending flange having an upper portion of one depth, a lower portion of less depth, and a connecting portion of intermediate depth.

CHARLES OTOOLE. 

